Pete Davidson was already nervous to be onstage at SNL's 40th anniversary show, but then he got the surprise of a lifetime ...
Davidson had only just joined the show when an "anxiety-provoking" anniversary rolled around. Then he encountered a rogue ...
So you're like dressed like a potato .... and then Jack Nicholson's just sitting there ... got a 5-second countdown to their segment, "Leonardo DiCaprio tugged my shirt. And he had his big ...